title: Second generation of calix[6]aza-Cryptands: synthesis of heteroditopic receptors for organic ion pairs.
abstract: The efficient syntheses of calix[6]azacryptands decorated with anion-binding groups on the narrow rim have been achieved from an 1,3,5-tris-protected calix[6]hexa-amine. These heteroditopic receptors can bind ammonium ions or organic ion pair salts with a positive cooperativity. In regard to their functionalization at the 1,3,5-phenolic positions, these compounds constitute the first examples of a second generation of C3 v symmetrical calix[6]azacryptands.
authors.affiliation: URCOM, Université du Havre, FST, Le Havre cedex, France.
authors.forename: Stéphane
authors.initials: S
authors.lastname: Le Gac
authors.forename: Mickaël
authors.initials: M
authors.lastname: Ménand
authors.forename: Ivan
authors.initials: I
authors.lastname: Jabin
mesh_terms: D047250:Calixarenes / Q000138:chemical synthesis*; D004988:Ethers, Cyclic / Q000138:chemical synthesis*; D009682:Magnetic Resonance Spectroscopy; D008709:Methenamine / Q000737:chemistry
chemical_list: D004988:Ethers, Cyclic; C518926:calix(6)aza-cryptand; D047250:Calixarenes; D008709:Methenamine